请问下面sql语句中的美元符是什么意思啊,谢谢
selectround(check_score/100/stat2_months,2)fromevaluate_busi_datawherechannel_id=$cha...
select round(check_score/100/stat2_months,2) from evaluate_busi_data
where channel_id = $channel_id$
and evaluate_month = $evaluate_month$ 展开
where channel_id = $channel_id$
and evaluate_month = $evaluate_month$ 展开
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